We will show you the operation of this lock, it is a pretty simple device. Basically you take this coke machine key, pop it open, and as you can see there is a little rod in there that popped out. That is the rod that does all the work when you put it on your kingpin, it holds it in place so it does not come off. We are going to install it so we can show you how it works that way as well. Go ahead and unlock it first, it slides on, push the button back down, and it cannot come off. To remove it is a simple reverse procedure, and that covers it for part # 50222.